You don't know that he's proof of any particular philosophy. Perhaps with good parenting, he'd be 10x as rich or 10x as happy or residing in the White House. We can't really know. I guess we can't really know anything then, can we, Mr. Moonbeam?
I'm not sure what you can or cannot know. I can know many things.
How parenting impacts the character development of children is one of a class of things that only someone like Dr. Mengele could accurately determine.